Solution
In each row, for the numbers $$a$$, $$b$$ and $$c$$, pattern is : $$c=\sqrt{a}-\sqrt{b}$$
Eg :- $$\sqrt9-\sqrt4=3-2=1$$
$$\sqrt{36}-\sqrt{25}=6-5=1$$
Similarly, $$\sqrt{144}-\sqrt{81}=12-9=3$$
=> Ans - (A)
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